An Introduction to the Study of the Comparative Anatomy of Animals
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Protoplasm, the material basis of life, was first discovered by Dujardin, who called it sarcode. Dujardin stated precisely what he meant by sarcode. "It is that," he said, "which, other observers have called a living jelly — that gelatinous, diaphanous structure, insoluble in water, which contracts into globular masses, attaches itself to one's dissecting needles, and can be drawn out in strings like mucus." Further than this, Dujardin, recognised that sarcode must be organised, must possess a ...structure. Not that he was able, with the imperfect microscopes of the day, to ob- serve and describe a structure, but he felt bound to postu- late one, because of the vital activity of the substance. " Sar- code is without visible organs, and without the appearance Digitized by Microsoft® 78 COMPARATIVE ANATOMY of cellulosity, but it is nevertheless organised, since it emits diverse prolongations carrying granules with them, extending and retracting themselves alternately — in a word, it has life." The word " protoplasm " is due to a botanist, Hugo von Mohl, who, in 1846, described the constitution of the so-called primordial utricle in plant cells — a semi-fluid, gelatinoid, living substance, similar to the sarcode already described by Dujardin.
What to read after An Introduction to the Study of the Comparative Anatomy of Animals?
You can find similar books in the "Read Also" column, or choose other free books by Bourne, Gilbert Charles, 1861- to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Protoplasm, the material basis of life, was first discovered by Dujardin, who called it sarcode. Dujardin stated precisely what he meant by sarcode. "It is that," he said, "which, other observers have called a living jelly — that gelatinous, diaphanous structure, insoluble in water, which contracts into globular masses, attaches itself to one's dissecting needles, and can be drawn out in strings like mucus." Further than this, Dujardin, recognised that sarcode must be organised, must possess a ...structure. Not that he was able, with the imperfect microscopes of the day, to ob- serve and describe a structure, but he felt bound to postu- late one, because of the vital activity of the substance. " Sar- code is without visible organs, and without the appearance Digitized by Microsoft® 78 COMPARATIVE ANATOMY of cellulosity, but it is nevertheless organised, since it emits diverse prolongations carrying granules with them, extending and retracting themselves alternately — in a word, it has life." The word " protoplasm " is due to a botanist, Hugo von Mohl, who, in 1846, described the constitution of the so-called primordial utricle in plant cells — a semi-fluid, gelatinoid, living substance, similar to the sarcode already described by Dujardin.
What to read after An Introduction to the Study of the Comparative Anatomy of Animals?
You can find similar books in the "Read Also" column, or choose other free books by Bourne, Gilbert Charles, 1861- to read onlineMoreLess
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